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Should you knock down and rebuild, or renovate? Compare real costs side-by-side with this free NSW calculator by Buildana. KDR vs Renovate Calculator — Free Tool by Buildana Should you knock down your existing home and rebuild, or renovate what you've got? It's one of the most expensive decisions a homeowner can make — and most people get it wrong because they're comparing gut feel, not actual numbers. This tool puts real cost estimates side-by-side so you can make the call with clarity. HOW IT WORKS Enter your current floor area, your target floor area, the scope of renovation (cosmetic / partial / major), and your finish level. The calculator models both options using current Sydney market rates and shows you which path costs less — and by how much. WHAT IT COMPARES • Knockdown & Rebuild: demolition costs + full rebuild at current $/m² rates • Renovation: scope-adjusted cost based on how much of the existing structure you're keeping RENOVATION SCOPES • Cosmetic — paint, floors, fixtures, kitchen and bathroom updates • Partial — structural changes to some rooms, new layout in parts of the home • Major — full reconfiguration, additions, new floor levels WHEN KDR WINS If you're increasing size significantly, the existing structure is compromised, or renovation complexity drives costs up — a knockdown rebuild often comes out cheaper and gives you a brand-new home. When renovation wins, you'll see that too. Built by Buildana, a Sydney-based custom home builder and developer. We specialise in knockdown rebuilds across Western Sydney, Sydney, and surrounding areas. Visit buildana.com.au/homes/knockdown-rebuilds for project examples and pricing. All estimates are indicative and based on current Sydney market data. Verify with a licensed builder before committing.